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|
use super::{Context, Module};
use crate::config::RootModuleConfig;
use crate::configs::env_var::EnvVarConfig;
use crate::formatter::StringFormatter;
/// Creates a module with the value of the chosen environment variable
///
/// Will display the environment variable's value if all of the following criteria are met:
/// - env_var.disabled is absent or false
/// - env_var.variable is defined
/// - a variable named as the value of env_var.variable is defined
pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
let mut module = context.new_module("env_var");
let config: EnvVarConfig = EnvVarConfig::try_load(module.config);
let env_value = get_env_value(context, config.variable?, config.default)?;
let parsed = StringFormatter::new(config.format).and_then(|formatter| {
formatter
.map_meta(|var, _| match var {
"symbol" => Some(config.symbol),
_ => None,
})
.map_style(|variable| match variable {
"style" => Some(Ok(config.style)),
_ => None,
})
.map(|variable| match variable {
"env_value" => Some(Ok(&env_value)),
_ => None,
})
.parse(None)
});
module.set_segments(match parsed {
Ok(segments) => segments,
Err(error) => {
log::warn!("Error in module `env_var`:\n{}", error);
return None;
}
});
Some(module)
}
fn get_env_value(context: &Context, name: &str, default: Option<&str>) -> Option<String> {
match context.get_env(name) {
Some(value) => Some(value),
None => default.map(|value| value.to_owned()),
}
}
#[cfg(test)]
mod test {
use crate::test::ModuleRenderer;
use ansi_term::{Color, Style};
const TEST_VAR_VALUE: &str = "astronauts";
#[test]
fn empty_config() {
let actual = ModuleRenderer::new("env_var")
.config(toml::toml! {
[env_var]
})
.collect();
let expected = None;
assert_eq!(expected, actual);
}
#[test]
fn defined_variable() {
let actual = ModuleRenderer::new("env_var")
.config(toml::toml! {
[env_var]
variable = "TEST_VAR"
})
.env("TEST_VAR", TEST_VAR_VALUE)
.collect();
let expected = Some(format!("with {} ", style().paint(TEST_VAR_VALUE)));
assert_eq!(expected, actual);
}
#[test]
fn undefined_variable() {
let actual = ModuleRenderer::new("env_var")
.config(toml::toml! {
[env_var]
variable = "TEST_VAR"
})
.collect();
let expected = None;
assert_eq!(expected, actual);
}
#[test]
fn default_has_no_effect() {
let actual = ModuleRenderer::new("env_var")
.config(toml::toml! {
[env_var]
variable = "TEST_VAR"
default = "N/A"
})
.env("TEST_VAR", TEST_VAR_VALUE)
.collect();
let expected = Some(format!("with {} ", style().paint(TEST_VAR_VALUE)));
assert_eq!(expected, actual);
}
#[test]
fn default_takes_effect() {
let actual = ModuleRenderer::new("env_var")
.config(toml::toml! {
[env_var]
variable = "UNDEFINED_TEST_VAR"
default = "N/A"
})
.collect();
let expected = Some(format!("with {} ", style().paint("N/A")));
assert_eq!(expected, actual);
}
#[test]
fn symbol() {
let actual = ModuleRenderer::new("env_var")
.config(toml::toml! {
[env_var]
variable = "TEST_VAR"
format = "with [■ $env_value](black bold dimmed) "
})
.env("TEST_VAR", TEST_VAR_VALUE)
.collect();
let expected = Some(format!(
"with {} ",
style().paint(format!("■ {}", TEST_VAR_VALUE))
));
assert_eq!(expected, actual);
}
#[test]
fn prefix() {
let actual = ModuleRenderer::new("env_var")
.config(toml::toml! {
[env_var]
variable = "TEST_VAR"
format = "with [_$env_value](black bold dimmed) "
})
.env("TEST_VAR", TEST_VAR_VALUE)
.collect();
let expected = Some(format!(
"with {} ",
style().paint(format!("_{}", TEST_VAR_VALUE))
));
assert_eq!(expected, actual);
}
#[test]
fn suffix() {
let actual = ModuleRenderer::new("env_var")
.config(toml::toml! {
[env_var]
variable = "TEST_VAR"
format = "with [${env_value}_](black bold dimmed) "
})
.env("TEST_VAR", TEST_VAR_VALUE)
.collect();
let expected = Some(format!(
"with {} ",
style().paint(format!("{}_", TEST_VAR_VALUE))
));
assert_eq!(expected, actual);
}
fn style() -> Style {
// default style
Color::Black.bold().dimmed()
}
}
|
